we expect there could be criminal charges against dzhokhar tsarnaev today. chillingly after the bombing a week with ago today, he and his brother tamerlan appeared to resume their normal lives. friends say he was at dartmouth, work withing out at the gym, talking about the bombing. and they are still in disbelief. >> it's hard top comprehend someone could go doing normal college kid stuff to bombing a marathon. >> and that about the older brother, tamerlan, 26 years old? he apparently talked to his parents in russia after the bombing and said everything was okay. he he went back to russia last year and was not interviewed afterwards. that has some on capitol hill wondering how did the intelligent agencies miss this? >> the fact that we could not track him as to be fixed. it's people like this that you don't want to let out of your site. this was a mistake. i don't know if our laws are in sufficient or the fbi failed but we're at war with radical islamists and we need to up our game. >> on "squawk box" last hour, he said the the whole thing this doesn't need